"An error occurred during fax reception. The document was not received or is incomplete."

Important:Some of the settings described here are only displayed if the advanced view is enabled in the user interface. The configuration procedure and notes on functions given in this guide refer to the latest FRITZ!OS.

Simply proceed as described below. After each measure, check whether the issue persists.

Checking the event log for error messages

As soon as fax reception fails for the first time after the restart, check whether an error message is given for the failed fax attempt. Then, follow the instructions given for that particular error message:

3 Checking whether T.38 was used for fax transmission

Look for aborted faxes under "Display table on completed telephone calls" and check whether "T.38" is displayed in the "Coding" column for these faxes:

If "T.38" is displayed:

The standard T.38 was used for this fax transmission.

If "T.38" is not displayed:

The standard T.38 was not used for this fax transmission. Your Internet telephony provider must support the T.38 standard. Without T.38 (Fax over IP), fax transmission over the Internet is not reliable.

Note:If your Internet telephony provider does not support T.38, then you can use an Internet number of an Internet telephony provider that does support T.38 to receive faxes.

If you are still not able to receive faxes, there are no further settings in your FRITZ!Box that influence faxing.